OEM Carrier Single-Pole Contactor 1-Pole 24V 30A for Model PY3GNAA24040NA

This is the factory-authorized OEM contactor (part# HN51KC024) specified for the Carrier PY3GNAA24040NA packaged unit. The contactor is the high-voltage relay that closes when the thermostat sends a 24V call for cooling, energizing the compressor and/or condenser fan motor. A failed contactor typically presents as an AC unit that simply will not turn on, hums without starting, or trips the breaker repeatedly — even when the thermostat is calling for cooling.

• Specs: 1-Pole (single-pole) | 24 VAC coil voltage | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | Factory part# HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part (FAP), engineered to exact factory tolerances. Generic contactors often use thinner contact material and lower-grade coil windings, leading to premature pitting, coil burnout, and repeat failures — especially on high-cycling residential systems.
• Install Difficulty: 3/5 — Always disconnect and lock out all power before servicing. Discharge any capacitors in the control panel before touching wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Verify 24V coil pull-in after installation with a call from the thermostat.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier PY3GNAA24040NA. Also cross-references to Carrier/Bryant/Payne systems listing HN51KC024 in their official parts documentation. Always verify the part number on your unit's wiring diagram or data plate before ordering. Our team is available to confirm fitment — contact us before you buy if you have any questions.